Fix SPI initialization for libopencm3 update#268
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kanflo merged 1 commit intokanflo:masterfrom Feb 14, 2026
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Replace rcc_periph_reset_pulse() with explicit hold/release sequence to restore display functionality after libopencm3 update. Fixes black screen issue on DPS5015 after recent libopencm3 changes.
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Thanks! (and sorry for the delay) |
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Summary
Fixes black screen issue caused by commit c52ebac which updated libopencm3 and changed SPI reset method.
Root Cause
Commit c52ebac replaced
spi_reset(SPI2)withrcc_periph_reset_pulse(RST_SPI2)during libopencm3 update. However,rcc_periph_reset_pulse()in newer libopencm3 doesn't properly complete the reset sequence, leaving SPI peripheral in undefined state and causing ILI9163C display controller initialization to fail.Fix
Replace
rcc_periph_reset_pulse(RST_SPI2)with explicit two-step reset:rcc_periph_reset_hold(RST_SPI2)- Assert resetrcc_periph_reset_release(RST_SPI2)- Release resetThis ensures proper reset timing and restores display functionality.
Testing
AI slop, but I tested it